P(-15)
s(-2)
=x(x-5)+3(x-5)
=(x+3)(x-5)
x=5
You paint 13 of a wall in 14 hours. At that rate, how long will it take you to paint one wall?
1 answer:
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P(-15)
s(-2)
=x(x-5)+3(x-5)
=(x+3)(x-5)
x=5
We see on the picture that :
When we go down one row, we add one horizontal and two diagonal cards.
In the first row we have 2 cards
In the second 2+3=5 cards
In the third 5+3=8 cards
etc.
General formula : in the n-th row from the top, we have
When we go down one row, we add one horizontal and two diagonal cards.
In the first row we have 2 cards
In the second 2+3=5 cards
In the third 5+3=8 cards
etc.
General formula : in the n-th row from the top, we have